A : `K_(sp)` is a constant value for any salt at particular temperature
R: Solubility of any salt is constant at a particular temperature.

Options

A. If both Assertion & Reason are true and the reason in the corret explanation of the assertion, then mark
B. If both assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark
C. If Assertion is true statement but Reason is false then mark
D. If both Assertion and Reason are false statements , then mark

Answer

To solve the question, we need to analyze the assertion and reason provided:

**Assertion (A):** Ksp is a constant value for any salt at a particular temperature.
**Reason (R):** Solubility of any salt is constant at a particular temperature.

### Step-by-Step Solution:

1. **Understanding Ksp:**
- Ksp (solubility product constant) is a specific equilibrium constant for a saturated solution of a salt at a given temperature. It quantifies the extent to which a salt can dissolve in a solvent.

2. **Analyzing the Assertion:**
- The assertion states that Ksp is a constant value for any salt at a particular temperature. This is true because Ksp is defined at a specific temperature, and it does not change unless the temperature changes. Therefore, the assertion is **True**.

3. **Understanding Solubility:**
- Solubility refers to the maximum amount of a solute that can dissolve in a solvent at a given temperature. It is also temperature-dependent.

4. **Analyzing the Reason:**
- The reason states that the solubility of any salt is constant at a particular temperature. This is also true because at a fixed temperature, the solubility does not change. Hence, the reason is **True**.

5. **Relationship Between Ksp and Solubility:**
- Ksp is directly related to the solubility of the salt. For example, for a salt like NaCl that dissociates into Na⁺ and Cl⁻ ions, if the solubility (S) is known, Ksp can be calculated as Ksp = [Na⁺][Cl⁻] = S × S = S². Therefore, if solubility is constant, Ksp will also be constant.

6. **Conclusion:**
- Since both the assertion and the reason are true, and the reason correctly explains the assertion, we conclude that the correct option is that both are true and the reason is the correct explanation of the assertion.

### Final Answer:
**Option 1:** Both assertion and reason are true, and the reason is the correct explanation of the assertion.

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